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    <title>Document</title>
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<script>
    var obj = { name: 'zhangsan', age: 20, like: ['足球', '游戏'] }
    var obj2 = JSON.parse(JSON.stringify(obj))
    console.log(obj,obj2);
    obj.like.push('跳舞')
    console.log(obj,obj2);
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